Furnace-door frame.



1116111611 Aug. 19, 1913.y

wnnnssss LLL. KNOX.

.FURNAGE DOOR FRAME.

,APPLICATION FILED AUG.'19. 1,912.

Patented Aug. 119, i913;

:filial-IL l I I I I |.I. 1

WITNESSES l turnen L.; Knox, or mtas, onto,

" ing and a depending leg It the opening.

f miran STATES; PATENT' crema.

ASSIGNOR T0 THE KNOX PRESSED & 'WLDED A STEEL COMPANY, OF NILES, UHIO, A. CORPORTIGN GF OHIO.

Eemnes-noon runnin.

inwoner.

Specication'of Letters ratent. appartem meu august ie, lata seiial- -ira trave?.y

Patenten aug. teneis.

Tof all 'whom t mag/concern.'

Be it known that l, LUTHER L; Knox, a resident of Niles, in the county of Trumbull and State of Ohio, have invented a new Aand useful Improvement in Furnace-Door line ll-lll of Fig. 1. Fig. 3 is a section onthe line III-lll of Fig. 2. Fig. t is a front elevation, partly broken away, of aslightly modiedform of door frame, and Fig; 5 is a section on the irregular line V-V of Fig; d.

My invention has relation to furnace door frames, and more particularly to water cooled frames designed for use with water cooled doors.

'llhe invention rovidesa door frame. which can be rea ily constructed; which will be durable; and which obviates the use of the top arch of refractory material heretofore commonly employed over the door opening.

rlhe nature of my-invention will be best understood by reference to the accompanying drawings in which-l have shown the preferred embodiment thereof, and which will now be described, it being premised, vhewever that various changes 'may be made in the details of construction and arrangement of parts Without departing from the spirit and scope of my invention, as defined in the appended claims. In these drawings, the numeral 2 designates the end wall of a furnace structure, having. a door opening .3 which extends upwardly to the furnace.

,4 designates my improved door frame, which preferably consists of sheet metal formed into a hollowlstructure consisting of an upper body por-tion above the door openat eachside of The upper the frame is formed at its lower edge with the inwardly 'offset hollow projecting portion 5, which extends underneath the roof wall 6 and directly below' the channel- Fig. 2 is a sectionl on they This distributing .Y pipe plurality of spray apertures 17 to direct the body portion of f water is supplied to the interior of the door frame by means of the two inlet connections 7 at the upper corners thereof and which extend downwardly within the respective legs lia. 'fhese two inlet pipes are connected by a transverse pipe 8 extending within the lower part of the body portion of the frame and havingv spray `openings arranged to direct the cooling water downwardly against its exposed wall. 9 designates an outlet connection communicating with the upper central portion of the frame. 10 indicates ahollow water cooleddoor having inwardly projecting top, bottom and side portions 11, which support the refractory lining body 12, and which bear against the outer face of the door frame. To form guides for the door frame-,it is constructed with a vertical odset 13 near each edge.

ln the modiieation shown in Figs. 4r and the construction is substantially the same that rst described, but the openi-nlg through the frame is shown' as having lan arched top wal-'l 14E; and instead of there being two separate inlet pipes, a single inlet pipe 15`is provided. rlhis inlet pipe 15 has a supply connection' atv 16 and extends downwar ly to the central portion of a distrib- -uting pipe ltnlwhich hes within the frame over 'the arched top wall 14: and. has a'leg 16hl depending into each leg of the frame. is provided with a coolingfwater against the vexposed walls of the frame. ln these figures, lx designates the upper body portion. of the door frame,

and ty the depending leg portions thereof.

My invention provides a simply and durably constructed furnace door frame in which, owing to the inward projection above the door opening and whose exposed-surface is constantly ing water, I am enabled to dispense with the refractory top Wall of the door opening which has heretofore been necessary. These refractory top walls are' diliicult to hold in place, particularly by reason of the extension and contraction to which they are subjected in use. They are `furthermore liable to injury from contact with the furnace charging or poking apparatus. The inward projection 5 o'f the frame is made to protect v the metal support for the roof wall 6.

It will be understood that the exact form and. construction of my improved door directly supplied with cool- A frame will vary according tothe particular type of furnace to which it is employed;

and that the water supply and circulating` connections may also be changed within the scope of my invention.

I claim: j i

1. A furnace having a door opening therein, said opening extending upwardly to the end supporting metallic frame member for the roof wall of the furnace, and a water cooled door frame having an inwardly offset hollow projection extending into the said opening and directly below the said member and root` wall, and' forming a protecting means for said member and wall; substantially as described.

2. A furnace having a door opening extending upwardly; to the roof wall of the furnace, a metallic supporting frame mem ber for said wall, the lower side of said frame member being substantially in line with the top wall of the door opening, a hpllow water-cooled door frame having an 1nwardly projecting portion extending into said opening directly below the roof wall and acting as a protector to the latter and to its supporting frame, and means for bringing a supply of cooling water into dic rect contact with the exposed wall of said door frame at the top of said opening; substantially as described.

3l A doorl frame for furnaces having a hollow upper body portion formed with a hollow inward projection at its lower edge, and having hollow depending legs, and a water discharge pipe having a branch within the body portion and a branch within each leg; substantialll as described.

4. A door frame or furnaces having a hollow upper body portion formed with a hollowrinw'ard projection at its lower edge, and having hollow depending legs, said legs being of L-shape in cross section to form -I door guides, and a water-discharge pipe having abranch within the body portion and a branch within each leg; substantially as described.

5. A furnace having a door-opening ex- -V roof arch, and a water-cooled door` framey having an inwardly projecting 'portion which extends into the upper portion of said opening directly below the base of the roo arch, substantially as described.

furnace door frame, comprising a' hollow structure having a door opening therethrough witha legat each side of said opening, of a water supply pipe extending downwardly into said structure, and hav ing a spray member extending downwardly into each of said legs, substantially as described.

In testimony whereof, I have hereunto set my hand.

LUTHER L. KNOX..

Witnesses:

GEO. B. BLEMING, R. A. BALDERsoN.

member 

